Isenttheletterearlythatmorningshegotinthatafternoon.A.inorderthatB,sothatC,forpurposethatD.inorderfor若选A则B、C都是可以的？？？？？？哪位高手解答啊？

Question

I sent the letter early that morning __________she got in that afternoon.
A.in order that B,so that C,for purpose that D. in order for
若选A则B、C都是可以的？？？？？？哪位高手解答啊？

Answer 1

选 A
in order that为了,后接从句,做目的状语
i get up early in order that i can catch the early bus.
for purpose of
so that 是表示因果关系的 ,而题目表示的目的